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block: drbd: avoid to use BIO_MAX_SIZE
Use BIO_MAX_PAGES instead and we will remove BIO_MAX_SIZE. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@canonical.com> Tested-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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1 changed files with 2 additions and 2 deletions
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@ -1327,14 +1327,14 @@ struct bm_extent {
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#endif
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#endif
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/* BIO_MAX_SIZE is 256 * PAGE_SIZE,
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/* Estimate max bio size as 256 * PAGE_SIZE,
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* so for typical PAGE_SIZE of 4k, that is (1<<20) Byte.
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* Since we may live in a mixed-platform cluster,
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* we limit us to a platform agnostic constant here for now.
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* A followup commit may allow even bigger BIO sizes,
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* once we thought that through. */
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#define DRBD_MAX_BIO_SIZE (1U << 20)
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#if DRBD_MAX_BIO_SIZE > BIO_MAX_SIZE
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#if DRBD_MAX_BIO_SIZE > (BIO_MAX_PAGES << PAGE_SHIFT)
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#error Architecture not supported: DRBD_MAX_BIO_SIZE > BIO_MAX_SIZE
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#endif
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#define DRBD_MAX_BIO_SIZE_SAFE (1U << 12) /* Works always = 4k */
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